Festo Электромотор MTR-DCI - Manual (Page 31)

1. System overview
1-11 Festo P.BE-MTR-DCI-PB-EN en 1209a
1.5 Dimensional reference system
For commissioning, a measuring reference system for refer-
encing the reference coordinates must be defined. By means
of the measuring reference system, all (absolute) positions
are defined and can be moved to.
1.5.1 Points of reference and positioning range
The measuring reference system is defined as follows:
1. Reference travel for defining the reference point
2. Setting the zero point (axis zero point and project zero
point offset)
3. Limiting the positioning range (software end positions).
Reference point REF Anchors the measuring reference system at either a reference
switch or fixed stop in dependence on the reference travel
method. (see also section “Reference travel”).
Axis zero point AZ Is a point at a distance displaced from the reference point
REF (this distance is the axis zero point offset).
Project zero point PZ Is a user-definable point of reference which can be selected
within the effective stroke and to which the actual position as
well as the target positions in the position set table refer.
The project zero point is shifted by a defined distance to the
axis zero point AZ (project zero point offset). The project zero
point PZ can only be set via FCT, CI object 21F4
h or FHPP
PNU 500 (not on the control panel).
Software end positions The permissible positioning range (effective stroke) is limited
by the settings of the software end positions. The software
end positions refer to the axis zero point. If the target posi-
tion of a positioning command lies outside of the software
limits, the positioning command will not be processed and an
error status will be set.